samsung-sm8650/android_kernel_samsung_sm8650-modules
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soc: swr-mstr-ctrl: add new lock to sync runtime_resume and runtime_suspend

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runtime_suspend may get from multi functions and reslock is
unlock and lock inbetween which may cause clk count mismatch
with multi rutime_suspend called. Add new lock to make sure
runtime_suspend is run in sequence.

Change-Id: Ie465ded6dc1db1244035e9f4d216466b630df82b
Signed-off-by: Meng Wang <mengw@codeaurora.org>
This commit is contained in:
Meng Wang
2021-04-27 13:47:10 +08:00
parent 3ae97cf8fa
commit 42d4d58d8b
2 changed files with 9 additions and 0 deletions
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8
soc/swr-mstr-ctrl.c
View File

@@ -2843,6 +2843,7 @@ static int swrm_probe(struct platform_device *pdev)
mutex_init(&swrm->clklock);
mutex_init(&swrm->devlock);
mutex_init(&swrm->pm_lock);
mutex_init(&swrm->runtime_lock);
swrm->wlock_holders = 0;
swrm->pm_state = SWRM_PM_SLEEPABLE;
init_waitqueue_head(&swrm->pm_wq);
@@ -3053,6 +3054,7 @@ err_irq_fail:
mutex_destroy(&swrm->iolock);
mutex_destroy(&swrm->clklock);
mutex_destroy(&swrm->pm_lock);
mutex_destroy(&swrm->runtime_lock);
err_pdata_fail:
err_memory_fail:
@@ -3090,6 +3092,7 @@ static int swrm_remove(struct platform_device *pdev)
mutex_destroy(&swrm->clklock);
mutex_destroy(&swrm->force_down_lock);
mutex_destroy(&swrm->pm_lock);
mutex_destroy(&swrm->runtime_lock);
devm_kfree(&pdev->dev, swrm);
return 0;
}
@@ -3123,6 +3126,7 @@ static int swrm_runtime_resume(struct device *dev)
__func__, swrm->state);
trace_printk("%s: pm_runtime: resume, state:%d\n",
__func__, swrm->state);
mutex_lock(&swrm->runtime_lock);
mutex_lock(&swrm->reslock);
if (swrm_request_hw_vote(swrm, LPASS_HW_CORE, true)) {
@@ -3145,6 +3149,7 @@ static int swrm_runtime_resume(struct device *dev)
pr_err("%s: irq data is NULL\n",
__func__);
mutex_unlock(&swrm->reslock);
mutex_unlock(&swrm->runtime_lock);
return IRQ_NONE;
}
mutex_lock(&swrm->irq_lock);
@@ -3244,6 +3249,7 @@ exit:
if (swrm->req_clk_switch)
swrm->req_clk_switch = false;
mutex_unlock(&swrm->reslock);
mutex_unlock(&swrm->runtime_lock);
trace_printk("%s: pm_runtime: resume done, state:%d\n",
__func__, swrm->state);
@@ -3264,6 +3270,7 @@ static int swrm_runtime_suspend(struct device *dev)
__func__, swrm->state);
dev_dbg(dev, "%s: pm_runtime: suspend state: %d\n",
__func__, swrm->state);
mutex_lock(&swrm->runtime_lock);
mutex_lock(&swrm->reslock);
mutex_lock(&swrm->force_down_lock);
current_state = swrm->state;
@@ -3371,6 +3378,7 @@ exit:
if (!hw_core_err)
swrm_request_hw_vote(swrm, LPASS_HW_CORE, false);
mutex_unlock(&swrm->reslock);
mutex_unlock(&swrm->runtime_lock);
trace_printk("%s: pm_runtime: suspend done state: %d\n",
__func__, swrm->state);
return ret;

1
soc/swr-mstr-ctrl.h
View File

@@ -135,6 +135,7 @@ struct swr_mstr_ctrl {
struct mutex reslock;
struct mutex pm_lock;
struct mutex irq_lock;
struct mutex runtime_lock;
u32 swrm_base_reg;
char __iomem *swrm_dig_base;
char __iomem *swrm_hctl_reg;